It would help no end in helping you if you you explained a bit more about exactly what we're looking at. I think the grass blade are textured, so I think it's either a masked texture or a texture with an alpha channel, but I can't tell which. I don't think you've modelled aroung the bottom of the grass blades, but perhaps I'm wrong.
It's hard to see where the dirt geometry underneath is actually layed out. Perhaps a wireframe of the scene would be handy here.
Other things would come into play too, depending on the above answers, like what format the texture is in.
It's hard to see where the dirt geometry underneath is actually layed out. Perhaps a wireframe of the scene would be handy here.
Other things would come into play too, depending on the above answers, like what format the texture is in.